Fuse



March 25 1924.

H. E. Ewl'NG FUSE Filed March 5. 1923 IHIIII INVINTOR Patented Mar. 2,5, 1924.

HARRY n. EWING, or UNroN'rowN, PENNSYLVANIA.

FUSE.

Application filed March 5, 1923.

vTo all fio/tom t may concern Be it known that I, HARRY E. EwiNG, a citizen of the United States, residing at Uniontown, in the county of Fayette and State of Pennsylvania, have, invented new and useful Improvements in Fuses, of which the following is a specification.

This invention relates to electrical devices, particularly to fuses, designed for use in electric circuits of various kinds and for various purposes, and has for its object the provision of a duplex fuse of such a nature that one side may be used while they other side constitutes a handle facilitating insertion or removal of the fuse into or out of the holder provided for it, the device not only beingeasy to handle but also having the advantage of providing in one unitary structure two separate fuses which are selectively usable, so that when one is burnt out the device may be turned over and the other one used.

Another object is the provision of a device of this character which includes a minimum number of parts which are very easily assembled, the device being consequently simple and inexpensive in manufacture, as well as eiiicient and durable in service and a general improvement in the art.

dll/'ith the above and other objects and a-dvantages in view the invention consists in the details of construction to be hereinafe tor more fully described and claimed and illustrated in the accompanying drawings, in which:

Figure l is a perspective view of one form of the device,

Figure 2 is a cross sectionv therethrough,

Figure 3 is a perspective view of a slight modification,

Figure a is a cross section through a modified form,

Figure 5 is an elevation, partly inv section, of a still further modified form,

Figure G is a longitudinal section through all forms,

Figure 7 is an elevation of a further modification,

Figure 8 is an elevation, partly in section of the form shown in Figure 4,

Figure 9' is a perspective view of one form of cap,

Figure l0 is a perspective view of another form of Cap.

Referring more particularly to the drawings, and especially to Figures l and 2, I

Serial No. 622,981.

have shown the device as comprising a body i0 of insulating material. such as sheet liber or the like and formed from al single piece having its ends curled or coiled upon themselves asindicated at il to define cylindrical channels. llisposed .upon the ends of these cylindrical members are metallic caps l2 which are connected with ends of the fuse wire 13 and each channel is filled with pulverized asbestos or other similar material indicated at lil.. y rThe caps l2 are slit at one side as indicated at l5 so that they may be easily engaged upon the cylindrical end members in enclosing relation to the ends thereof.

In Figure 3 I have shown the intermediate portion of the sheet l0 as formed with a V-shaped notch or groove 16 which permits the body of the device to be easily broken into two pieces so as to define two separate fuses.

In Figure 4: the structure is slightly different inasmuch as the body 17 instead of being a thin sheet with coiled or rolled edge is a thicker sheet having its ends or opposite side portions IS rounded and formed with bores 19 which contain the fuse wires 2O which have their ends connected with the metal caps 21 which are slit at 22 and held in place in the same manner as the caps 12.

In Figure 5 I have shown still another modification in which the body 23 is formed at its edges with cylindrical portions 24 having bores 25 which contain the fuse wires 26. In this form, however, the caps 27 connected with the ends of the fuse wires are not slit or slotted but the body 23 is slotted as indicated at 28 to accommodate the caps when they are placed iny position upon the cylindrical or rounded ends.

In the form of the device shown in Figure 7, the body 29 has its central portion cut away as shown at 30 whereby to permit the extra fuse to swing around to the side in case the device is used in places where switchesare employed, as otherwise there might be interference with the switch action.

In all forms of the device the caps are connected with the fuse wires in the same manner and the spaces around the fuse wires are all filled with pulverized asbestos or other non-conbustible material indicated at 3l.

In the use of the device it will be seen that either fuse member may be engaged 

